If two W123's hit, absolutely nothing.

The W123 was the last true tank that would not ding up from a minor accident. The W126 was the last MB(in the US) to have the ultra stong bumpers and shock absorbers. The problem with the W126, is that the paint off the polyurethane can fleck off in an accident.

And, we all miss those sideguards from the W116 and W123.